Question

density is

a measurement of the quantity of matter in an an object.

mass per unit volume of a material.

anything that takes up space and has mass.

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Explanation:

• The first option describes mass (quantity of matter in an object), not density.
• The second option: Density is defined as mass divided by volume, so it is mass per unit volume of a material.
• The third option describes matter (anything with mass and volume), not density.

Answer:

The correct option is: mass per unit volume of a material.